wext: refactor

Refactor wext to
 * split out iwpriv handling
 * split out iwspy handling
 * split out procfs support
 * allow cfg80211 to have wireless extensions compat code
   w/o CONFIG_WIRELESS_EXT

After this, drivers need to
 - select WIRELESS_EXT	- for wext support
 - select WEXT_PRIV	- for iwpriv support
 - select WEXT_SPY	- for iwspy support

except cfg80211 -- which gets new hooks in wext-core.c
and can then get wext handlers without CONFIG_WIRELESS_EXT.

Wireless extensions procfs support is auto-selected
based on PROC_FS and anything that requires the wext core
(i.e. WIRELESS_EXT or CFG80211_WEXT).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 49 insertions, 22 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 3d874c6..241ea14 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1171,6 +1171,10 @@ struct wiphy {
 	struct net *_net;
 #endif
 
+#ifdef CONFIG_CFG80211_WEXT
+	const struct iw_handler_def *wext;
+#endif
+
 	char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
 };
 
@@ -1345,7 +1349,7 @@ struct wireless_dev {
 	struct cfg80211_internal_bss *auth_bsses[MAX_AUTH_BSSES];
 	struct cfg80211_internal_bss *current_bss; /* associated / joined */
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	/* wext data */
 	struct {
 		struct cfg80211_ibss_params ibss;
diff --git a/include/net/iw_handler.h b/include/net/iw_handler.h
index e9054a2..d5d3371 100644
--- a/include/net/iw_handler.h
+++ b/include/net/iw_handler.h
@@ -323,18 +323,19 @@ typedef int (*iw_handler)(struct net_device *dev, struct iw_request_info *info,
  */
 struct iw_handler_def
 {
-	/* Number of handlers defined (more precisely, index of the
-	 * last defined handler + 1) */
-	__u16			num_standard;
-	__u16			num_private;
-	/* Number of private arg description */
-	__u16			num_private_args;
 
 	/* Array of handlers for standard ioctls
 	 * We will call dev->wireless_handlers->standard[ioctl - SIOCSIWCOMMIT]
 	 */
 	const iw_handler *	standard;
+	/* Number of handlers defined (more precisely, index of the
+	 * last defined handler + 1) */
+	__u16			num_standard;
 
+#ifdef CONFIG_WEXT_PRIV
+	__u16			num_private;
+	/* Number of private arg description */
+	__u16			num_private_args;
 	/* Array of handlers for private ioctls
 	 * Will call dev->wireless_handlers->private[ioctl - SIOCIWFIRSTPRIV]
 	 */
@@ -344,6 +345,7 @@ struct iw_handler_def
 	 * can put it in any order you want and should not leave holes...
 	 * We will automatically export that to user space... */
 	const struct iw_priv_args *	private_args;
+#endif
 
 	/* New location of get_wireless_stats, to de-bloat struct net_device.
 	 * The old pointer in struct net_device will be gradually phased
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index a120284..6994101 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -80,7 +80,7 @@ struct net {
 #ifdef CONFIG_XFRM
 	struct netns_xfrm	xfrm;
 #endif
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_WEXT_CORE
 	struct sk_buff_head	wext_nlevents;
 #endif
 	struct net_generic	*gen;
diff --git a/include/net/wext.h b/include/net/wext.h
index 3f2b94d..4f6e742 100644
--- a/include/net/wext.h
+++ b/include/net/wext.h
@@ -1,29 +1,19 @@
 #ifndef __NET_WEXT_H
 #define __NET_WEXT_H
 
-/*
- * wireless extensions interface to the core code
- */
+#include <net/iw_handler.h>
 
 struct net;
 
-#ifdef CONFIG_WIRELESS_EXT
-extern int wext_proc_init(struct net *net);
-extern void wext_proc_exit(struct net *net);
+#ifdef CONFIG_WEXT_CORE
 extern int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
 			     void __user *arg);
 extern int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
 				    unsigned long arg);
+
 extern struct iw_statistics *get_wireless_stats(struct net_device *dev);
+extern int call_commit_handler(struct net_device *dev);
 #else
-static inline int wext_proc_init(struct net *net)
-{
-	return 0;
-}
-static inline void wext_proc_exit(struct net *net)
-{
-	return;
-}
 static inline int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
 				    void __user *arg)
 {
@@ -36,4 +26,35 @@ static inline int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
 }
 #endif
 
+#ifdef CONFIG_WEXT_PROC
+extern int wext_proc_init(struct net *net);
+extern void wext_proc_exit(struct net *net);
+#else
+static inline int wext_proc_init(struct net *net)
+{
+	return 0;
+}
+static inline void wext_proc_exit(struct net *net)
+{
+	return;
+}
+#endif
+
+#ifdef CONFIG_WEXT_PRIV
+int ioctl_private_call(struct net_device *dev, struct iwreq *iwr,
+		       unsigned int cmd, struct iw_request_info *info,
+		       iw_handler handler);
+int compat_private_call(struct net_device *dev, struct iwreq *iwr,
+			unsigned int cmd, struct iw_request_info *info,
+			iw_handler handler);
+int iw_handler_get_private(struct net_device *		dev,
+			   struct iw_request_info *	info,
+			   union iwreq_data *		wrqu,
+			   char *			extra);
+#else
+#define ioctl_private_call NULL
+#define compat_private_call NULL
+#endif
+
+
 #endif /* __NET_WEXT_H */